Trusens Z7000 Performance HEPA Filter Replacement Pack 2DescriptionSpecificationsShipping The filter is at the core of purifying your air and replacing it is essential for optimal air purifier performance. Product Features The dual sided filters are comprised of a True HEPA filter with highly efficient Activated Carbon honeycomb granules. The Activated Carbon Filter captures volatile organic compounds (VOCs). For best results, replace the filter every 12 months depending on usage. A change indicator light